Use CRLF line delimiter for text/uri-list data

According to RFC 2483, which describes text/uri-list, the line delimiter
must be CRLF (instead of the currently used LF). Some applications
strictly expect the CRLF delimiter and fail to properly parse the
uri-list otherwise (e.g., WineX11/XWayland).

https://datatracker.ietf.org/doc/html/rfc2483

5. The text/uri-list Internet Media Type
The format of text/uri-list resources is:
3) As for all text/* formats, lines are terminated with a CRLF pair.

Pick-to: 6.4 6.3 6.2 5.15
Change-Id: I7c062224a9060028ab6293fdf172692ade28cca5
Reviewed-by: David Edmundson <davidedmundson@kde.org>

src/plugins/platforms/wayland/shared/qwaylandmimehelper.cpp

@@ -38,7 +38,7 @@ QByteArray QWaylandMimeHelper::getByteArray(QMimeData *mimeData, const QString &
         QList<QUrl> urls = mimeData->urls();
         for (int i = 0; i < urls.count(); ++i) {
             content.append(urls.at(i).toEncoded());
-            content.append('\n');
+            content.append("\r\n");
         }
     } else {
         content = mimeData->data(mimeType);